Window-scaffold.



F. ROTTI. WINDOW SCAFFOLD. APPLICATION FILED MAY 28,!915. RENEWED DEC. 5.191s.

Patented Feb. 13, 1917.

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WINDOW SCAFFOLD. 7 APPLICATION FILED MAY 28. 1915. RENEWED Dec. 5. 1915.

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' wvmrop m flea? 132%??? A TTOR/VEY Patented Feb. 13, 1917.

F. ROTTI.

WINDOW SCAFFOLD. APPLICATION FILED MAY 28, 19l5- RENEWED DEC- 5. I916.

1,21 5,994. Patented Feb. 13, 1917.

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FREDERICK ROTTI, OF ELIZABETE-IPORT, NEW JERSEY..

WINDOW-F$GAFFOLD.

Application filed May 28, 1915, Serial No. 30,5297.

0 all whom it may concern:

Be it known that I, Fnnonnron Born, a citizen of the United States, residing at Elizabethport, county of Union, and State of New Jersey, have invented certain new and useful Improvements in \Vindow-Sca-ffolds, of which the following is a specification, reference being had to the accompanying draw ings.

This invention relates to new and useful improvements in window scaffolds used by painters, outside decorators and window washers, and has for its object the provi: sion of a scaffold which may be readily detached from one window and applied to an other and when not in use may be folded to occupy a minimum amount of space.

Another object is to provide a scaffold which may be adjusted to any desired angle to suit the requirements of the operator.

A further object of the invention is the provision of a locking means which will positively secure the parts in their adjusted position and thereby prevent the scaffold from collapsing; 1

With these and other objects in view as will appear to those skilled in the art, this invention consists in the features and combination of parts described in the following specification, which should be read in connection with the accompanying drawings and further set forth in the appended claim.

In the drawings like letters of reference indicate similar parts in the several views.

In the accompanying drawings, Figure 1 is a side elevation of a complete window scaffold in accordance with my improvements, Fig. 2 is a view on line 22 Fig. 1 looking in the direction as indicated by the arrows, Fig. 3 is a front elevation of the supporting arm, Fig. 4 is a section on line 44: Fig. 3, Fig. 5 is an enlarged view of sliding detent showing the supporting arms in section, Fig. 6-is a fragmentary view showing the detent in section as on line 6-6 Fig. 5, and the manner in which the lock is operated, also the relation'between the lock and the supporting arms and Figs. 7 8

and 9 are detailed views illustrating members which are adapted to be secured to the ends of the supporting arms, for the' purpose hereinafter set forth. Fig. 10 is a bottom view. Fig. 11 shows a side elevation of the scaffold as it would appear when in posi- Specification of Letters Patent.

Patented Feb. 13, 1917.

Renewed December 5, 1916. Serial No. 135,271.

tion attached to the window sill of a build ing.

The platform 9 is adapted to be maintained in its working position at one end by the supporting arms 10 and 10 which extend downward and inward relative to the platform, and abut against a wall or the like at their lower ends. Arranged intermediate the ends of the supports 10 and 10 are two strut members consisting of rods 1212 and 1515 which are adjustably secured together by means of clips 1313 and 1114;. On the underside of the platform 9 are secured two bearing members 16-16, which are arranged to support a shaft 16, which in turn is adapted to form a pivot bearing for the free ends of the rods l515. The studs 1111. secured to the supports 1010 are adapted to form a pivotal connection between said supports and the ends of the rods 1212.

In each of the supporting members 10--10 are a plurality of notches 17. The upper ends of the supports are connected by a transverse bar 18 while at their opposite end there is a wall engaging bar 19. Cross strips 20 are secured to the supports 1010 to brace the same and thereby provide a solid construction. Adjacent each end of the wall engaging bar 19 is an enlarged casting 2121 having therein dove-tailed slots 2222' for a purpose hereinafter described also steps 23-2 may be secured adjacent the lower ends of the supports 1010 to the rear of the bar 19 if desired.

The platform 9 has apertures 25 arranged therein to provide a passageway for the upper ends of the supports 10-10, metallic wear plates 26-27 provided with openings are secured one to the upper and one to the lower face of the platform.

Slidably mounted on the plate 26 is a locking detent 28, and pivotally secured to the platform 9 is a handle 29, a link 30 affords a connection between the handle 29 andthe locking detent 28. Glips 3131' retain the detent in its operative position and also form stops for the same in its forward and rearward movements.

In order to secure the detent 28 in its adjusted position and thereby prevent the same from moving, there is provided a bolt and wing nut 32-32 respectively. The bolt extends through the platform 9, the

plate 26 and an elongated slot in the detent 28, and the wing nut 32', is threadedly mounted on the projecting end. It will readily be seen that by fastening the nut, the detent will be positively locked from movement.

To the underside of the inner end of the platform 9 is a transverse clamping member 33, which is adapted to be secured into its adjusted position by bolt and wing nuts 344%, which in turn are arranged to travel in elongated slots 9-9 in the'platform 9. The clamping member is provided with two gripping faces 85 and 36 to suit various styles of window sills.

Should it happen, that beneath the window to which the scaffold is attached, there is a sign or any other structure which may be injured by the contacting edge of the support, the members 8 and 8 may be secured in the dove-tailed recesses 2222 as shown in Fig. 9 thereby preventing the rubbing action of the ends of the supports 10l0. These members may be simply bufi'er blocks as illustrated in Fig. 7, or a rod as illustrated in Fig. 8, the latter is shown in applied position in dotted lines in Fig. 1.

Having described my invention in its preferred form I wish it understood that departures therefrom in detailed construction may be resorted to without departing from the spirit or scope of the following claim.

IV hat I claim is:

In a window scaffold comprising a platform provided with apertures forming passageways therein, said passageways being closed at both of their ends, means adjacent one end of the platform for securing it to the window sill, supports pivotally arranged adjacent the opposite end of said platform adapted to be adjusted in the passageways, said supports having a plurality of notches arranged inwardly of and lying in parallel relation to the body plane of said securing means, and slidable means carried by the platform for engagement with said notches to cause one of the ends of said supports to be moved against one of the said ends of the passageways and thereby lock the supports against movement in the 111 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

